Clean the pluginData of a gorup if it has been removed on server, but not on kopete
Clean the pluginData of a gorup if it has been removed on server, but not on kopete

svn path=/trunk/kdenetwork/kopete/; revision=384501

josh-wambua/kopete,josh-wambua/kopete,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,Jtalk/kopete-fork-xep0136,Jtalk/kopete-fork-xep0136,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,josh-wambua/kopete